en.wiktionary.org/wiki/plaster_of_Paris#:~:text=plaster of Paris (uncountable) A hemihydrate of calcium,dry; used to make casts, molds and sculpture.
- plaster of Paris (uncountable) A hemihydrate of calcium sulfate , made by calcining gypsum, that hardens when moistened and allowed to dry; used to make casts, molds and sculpture.
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Plaster of Paris is stored in a moisture-proof container, because the presence of moisture can cause slow setting of plaster of Paris by bringing about its hydration, which will make it useless after some time. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum.
Calcium sulfate is the inorganic compound with the formula CaSO4 and related hydrates. In the form of γ-anhydrite, it is used as a desiccant. One particular hydrate is better known as plaster of Paris, and another occurs naturally as the mineral gypsum. It has many uses in industry. All forms are white solids that are poorly soluble in water. Calcium sulfate causes permanent hardness in water.
- 136.14 g/mol (anhydrous), 145.15 g/mol (hemihydrate), 172.172 g/mol (dihydrate)
- 1,460 °C (2,660 °F; 1,730 K) (anhydrous)
- 0.21g/100ml at 20 °C (anhydrous), 0.24 g/100ml at 20 °C (dihydrate)
From Wikipedia, the free encyclopedia (Redirected from Plaster of Paris (song)) Head Carrier is the sixth studio album by the American alternative rock band the Pixies, released on September 30, 2016 on Pixiesmusic and PIAS.
Feb 27, 2020 · plaster of Paris (uncountable) A hemihydrate of calcium sulfate , made by calcining gypsum , that hardens when moistened and allowed to dry; used to make casts , molds and sculpture . Synonyms [ edit ]
Plaster is a material similar to mortar and cement. Plaster of Paris is one kind, made from gypsum by heating it. It is used to make copies of footprints, fossils, skeletons, and other things. Other kinds are used for buildings and other purposes.
In medieval and Renaissance times, gesso (usually made of plaster of paris mixed with glue) was applied to wood panels, plaster, stone, or canvas to provide the ground for tempera and oil painting. Plaster of paris is prepared by heating calcium sulfate dihydrate, or gypsum, to 120–180 °C (248–356 °F). With an additive to retard the set, it is called wall, or hard wall, plaster, which can provide passive fire protection for interior surfaces.
plaster of Paris calcium sulfate dihydrate, reduced to a fine powder; the addition of water produces a porous mass used in making casts and bandages to support or immobilize body parts, and in dentistry for making study models.
Nov 17, 2020 · Plaster of Paris is a simple craft material that can be easily made at home. All you need is flour and water, or glue and water if you'd rather not handle flour. Once you've made it, you can use it to make plaster casts, molds, or even chalk! Method 1
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- wikiHow Staff